Automatic winding machine



Nov. 2, 1943. H. F. HILD AUTOMATIC WINDING MACHINE Filed March 15, 19395 Sheets-Sheet 1 w PM R O T N E V m ATTORNEYS Nov. 2, 1943.

H. F. HlLD AUTOMATIC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet2 Nov. 2, 1943. H. F. HILD 2,333,570

AUTOMATIC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet 3 INVENTOR*mmmM ATTORNEYS Nov. 2, 1943. H. F. HILD AUTOMATIC wnmme mcumn' 5Sheets-Shee t 4 Filed March 15, 1939 sic mm w \NVENTOR M A411 BY H z,EMQW ATTORNEYS Nov. 2, 1943. H. F. HILD 7 2,333,570

AUTOMAT IC WINDING MACHINE Filed March 15, 1939 5 Sheets-Sheet 5INVENTOR ATTORN EY Patented Nov. 2, 1943 UNITED- su'rom'rrc wmnmc mournsHenry Frank Hild, Plainileld, N. 3., asslgnor to Condenser Corporationof America, South Plainiield, N. 3., a corporation of New YorkApplication March 15, 1939, Serial No. 281,958

20 Claims.

This invention, relates to winding machines for winding into condenserrolls alternate strips of foil and insulation and has for its principalobjects to simplify the winding of such rolls, minimize waste ofmaterials and increase the rate of production.

It has heretofore been the practice in the winding of foil and paper orother insulator strips into condenser rolls, for the operator to cut thestrips when the condenser roll is completed and to tear away the endportion of the foil strip to insure that no part oi the foil stripsshall extend beyond the ends of the covering paper strips; for if anypart of the foil did extend beyond the ends of the insulation therewould be danger of the foil strips touching each other and thusshort-circuiting the condenser. This has entailed loss of time and ofthe foil material. According to this invention this loss is eliminatedby automatically perforating the foil and pulling the foil apart at theperforations before the insulating strips are cut. and then cutting theinsulating strips at a point between the severed foil ends.

Further objects and advantages of the invention will become apparentfrom the following detailed description considered in reference to thefollowing drawings of which,

Fig. 1 illustrates a side view of the winding apparatus;

Fig. 2 illustrates a top view of the apparatus;

Fig. 3 illustrates a sectional detail of Fig. 1 taken at line 3-3 oiFig. 2, showing the foil perforating apparatus;

Fig. 4 is another sectional detail of the apparatus shown in Fig. 3illustrating a different position of the mandrels;

' Fig. 5 shows a mandrel pin;

Fig. 6 is an enlarged view showing the separation of the foilstrips'during the operation of the machine;

Figs. 7, 8 and 9 show details of parts of the perforating mechanism;

Fig. 10 is a rear elevation view of the clutch and drive portion of Fig.2;

Fig. 11 is a sectional view taken at line I l-ll of Fig. 2; and

Fig. 12 is another sectional viewtaken at line l2-l2 of Fig. 2.

The drawings ill machine into which the foil perforating and separatingmechanism according to this invention is incorporated.

The winding machine comprises a frame It supporting a vertical panel Hwhich supports eight pins I: to It, inclusive, carrying rotatablespindles l2 to is, respectively, which support rolls of foil andinsulating material such as paper. Rolls i, 2, 3 and 4 are paper orinsulating rolls and rolls l and 3| are foil rolls. At the oppositetrate a condenser winding end of frame Hi from the panel there isfastened a stud 2| on which is journaled a hand wheel 22 which acts as arotatable mandrel support.

A head 32 on this stud holds the hand wheel.

in place. The hand wheel is provided with three radial arms 23, 24 and25, each of which carries a hub 38, 21' and 23', respectively, in whichare Journaled bushings, 21 and 23, respectively', through whichprotrudes grooved mandrels 29. 30 and 3i, respectively, fixed to theirrespective bushings. (See Figs. 3 and 4.) Each of the bushings is freeto rotate within its hub or bearing 28', 21 or 23 (see Fig. 2) and atthe back end of each bushing there is fastened 1s a pinion (I40, I40 andI4!" respectively) and also a collar provided with a driving pin 33(shown in Fig. 2). A mandrel pin 34 having a head 35, shown in Fig. 5,is adapted by placing it in the groove in each mandrel to hold theassembled strips of foil and paper in layers between the pinand grooveto cause them to wind up into the condenser roll when the mandrel isrotated, as shown in Fig. 3.

Power means is provided for driving the mandrels. This comprises a powerdriven pulley 33 (Fig. 2) fastened to a clutch member 31, the pulley andclutch member being free to rotate on a shaft 33 which is journaled inthe frame it. Shaft 33 has threads 39 for a; substantial distance at oneend, and at the opposite end has attached to it a beveled gear 40'. Aclutch member 3'l' attached to the shaft 38 is adapted to engage withclutch member 31 to that when the member 31' is moved sideways intoengagement at with the other clutch member 31 the entire shaft andbeveled gear 40 is rotated. For the purpose of engaging the clutchmembers there is provided a lever 9 which when operated turns a bellcrank 8 against a dog 'I fastened to the clutch 0 Journal bearing arm1i, thereby moving the' members 31', ll, 12 and III to the left (Fig.2). As shown in Fig. 2, there is also journaled to the vertical wall offrame in another shaft 4i having at one end a beveled gear 42 inengagement with beveled gear 40, and at the opposite end a collar 43with a driving pin 44 which when the hand wheel 22 is in the position ofFigs. 1 to 3, engages the driving pin 33 of the mandrel bushing collarwith which it is in engagement; being thereby enabled to drivethatmandrel and wind the foil and paper strips into the con.- denser roll.

There is provided in accordance with this invention an automatic foilstrip perforater 43 (shown in section in- Figs. 3 and 4) whichperforates the foil strip at the proper point so that the foil stripsevers when tension is applied'at both sides of the perforation,followed by the cutting of the paper strip in the manner herein- 30after described. The perforator 46 comprises two.endblocksllandllioinedatthetopandbottom bybars48and88. Thisdevice48Isheldby anarm48'attachedtoblock48,apin 'I8fixed totheframeI8beingpassedthroughaholein arm48'; andthe arm88'isfixedtothe pin I8 byset screw I8. Extending between the end blocks are two rotatable pins 8|and 88 (see the sectional view of Fig. 8) each having held between itsends 'a plate 88 and 84, respectively, each plate having perforatingteeth 88 attached to protrude into holes 88 of perforation plates 81 and88, respectively, fixed between the end blocks '81 and 48. Fig. 7 showsa detail of the assembly of plates 88 and 84 and their pins. Fig. 8illustrates a detail of fixed plate 81 and Fig. 9 shows fixed plate 88.Pin 8| has fastened to one end a lever 88 and pin 88 similarly hasfastened to it a lever 88 immediately under and in sliding enmoment withlever 88. Lever "has fastened to it an arm 8| carrying flexible en gplates 8| which extend horizontally and are adapted to be operatedautomatically to rotate pins II and 88 and thin deprss teeth "into holes88 to perforate the foil strips at the proper time almg the line of theperforated teeth. @AsshowninFlgs.1,2,3and4,thereisattachedtothehead 82ofthestud 8| abs-r88 having at one end a knife blade 84 which functionsto out the paper strips after the foil has been perforated and brokenapart.

For determining the amount of paper and foil strip permitted to be woundon the mandrel before the perforating and cutting of the strips, thereis provided a mechanism (shown in Fig. 2) for counting the revolutionsof the mandrel. This is the mechanism shown in Weiss Patent 2,166,852issued July 18, 1839. This comprises a half nut 88 slidably pivoted atone side thereof on a rod I2 and the threaded shaft 88 so that when thishalf nut is in engagement withthe rotating tates mandrel 8|.

byaconnectingrodll'witharatchetpawl.

which pivots a't pin 88. On the spindles I8 and IItowhicharefixedthefoil rolls 88 and 8| there are fastened ratchet wheels81 and 88, respectively, adapted to be engaged by the pawl teeth 88 and88, respectively. The arrangement is such that when the hand wheel 82 isrotated the hub 81' moves out of engagement with the portion 88 of rod88, allowing the spring 82 to pull the pawl teeth 88 and 88 intoengagement with the respective ratchet wheels 81 and 88, thus stoppingthe rotation of the foilrolls. Then when the next hub 28' on the handwheel pushes member 88, the pawls are disengaged. allowing the foilrolls to rotate again.

There is also provided a stationary mutilated gear I fastened on fixedstud 2 I whose teeth are cut away approximately 120 degrees as shown inFigs. 3 and 4 which gear is in engagement with two of the pinion gearsI88, I48 and I48" rigidly fastened to the bushings 88, I! and 28 ofmandrel shafts 28, 88 and 8|, respectively. when hand wheel 22 isrotated in a counterclockwise direction pinion gear I48" engages gear Iand ro- The first teeth of gear I are so positioned that the piniongears do not engage it and are free to rotate while in the windingposition.-

To facilitate the feeding of the strips of foil to the mandrel there isprovided a feeding mechanism comprising idler wheels I88 and I8I (seeFigs. 1 and 2), the wheel I88 being held in fric-' tional engagementwith the foil roll 88 and paper roll 2 and the other wheel |8| beingheld in fricshaft it travels to the right (with reference to Fig. 2)untilitstrikesastopflflxedtoabarfl. Bar

81 has at its end a dog 81' which strikes a catch 88 adapted to engage ahead I8 located at the end of shaft 88. Head I8 is rigidly fastened tobar If, the other end of the bar beingattached to the Journal bearingarm II, which moves clutch 81'. When the stop, 88 is engaged by thetravelinghalfnut88thecatch88isliftedfromhead I8 causing the latter tospring to the right (with reference to Fig. 2) by action of compressionspring 18, and thus disengage the clutch members 81 and 81' so that themandrel which is being driven new steps. At the same time, due to thedisengagement of the under surface of head It from over member I8 on barI8, spring I4 is permitted to lift bar II, which lifts the half nut outof engagement with the threads 88, pivoting it on bar 12 and permitthigthe half nut to return home by the action of hairpin spring I8. When thehalf nut is almost back in its initial position thebar88attachedtothehalfnutstrikesthe cushion plates 8|" attached to the arm 8|of the perforating mechanism, in passing, because thehalfnutisnowtiltedtoward arm 8| bybarI8 to permit this striking. Thestriking of plate 8| rotates the shafts 8| and 82 to produce a lineofperforations in the foil strips which are under the teeth. Theseshafts 8| and 82 then drop back to the unperforating position by theweight of arms 88 and 88.

Thereisprovidedabrakingfor braking the rotation of the foil rolls 88 and8|.

This apparatus (shown in Fig. 1) comprises a rod 88pivotedatpinfltotheframeandconnected tional engagement with the foilroll 8| and the paper roll 4. The top wheel is lournaled at the end ofan arm I 82, the opposite end of this am being pivoted on lever arm I88,one end of this latter lever I88 being pivoted at the spindle of thepaper roll 2 and the other end having a weight I84 for causing the idlerwheel to rest firmly on the rolls 88 and 2. By this arrangement theidler wheelis always maintained at the same definite frictionalengagement with each of rolls 88 and 8.

The lower idler wheel I8| is similarly iournaled on the lower end of armI88, the upper end of which is pivoted-on the end of a lever arm I88journaled on the spindle of roll 4. end of this latter lever I88 carriesa weight I 81 which always pulls the idler wheel up against the tworolls 4 and 8|.

When the insulating strips are pulled the idler wheels I88 and |8|rotate and tend to rotate the foil rolls with which the idlers are inengagement. This arrangement facilitates the feeding of the foil stripsby causing the rotation of the foil rolls 88 and 8| when theratchetpawls 88 and 88 are not engaged. This foil feeding arrangement isdescribed and claimed in greater detail in x3, and also threads thepaper strips I82, I88, I88

and!" through device 48, the paper I82 passing over platen, paper I88and I 84 passing under plate 81, ahd paper I88 passing under plate 88,as shown in Figs. 3 and 4. These layers of strips are then run past thegroove of mandrel 8| and the mandrel pin 84 is inserted in the grooveand into the end of bushing 88 to hold them.- The The Opposite outer endof the mandrel fits into the space 35' of the mandrel pin head 35. (SeeFig. 5.) The starting lever 9 connected with member 1|, is then operatedto engage the clutch members ll and 31' and to depress bar 15 by theriding of head 10 on bevel 18" to the top of member I! on bar 15. Theshafts 38 and 4| and mandrel 3| are rotated, thus rolling the condenser.The half nut 85, which prior to the rotation of shaft 38 was in itsinitial position shown in Fig. 2, moves to the right on the rotatingshaft 38, and at the end of a predetermined number of mandrel turns thehalf nut 85 strikes the stop 88, movins bar 61 to the right and thuslifting catch 88 from head 10 and causing this head on the clutch member31' attached thereto to spring to the right away from the other clutchmember 3!. This stops the revolution of the mandrel and simultaneouslycauses bar 15 to lift half nut 85 from the worm, causing the half nut tospring to the left so that immediately the perforator arm BI is struckby bar 80, causing the two foil strips we and IN to be perforated by theperforating members. Immediately after the perforating operation theperforating plates move back to their initial position due to the weightof arms 59 and 8d. The operator then grasps the hand wheel at the sametime operating catch I10 to retract pin ill from an indentation in thehand wheel, and rotates the hand wheel counterclock-wise (with referenceto Fig. l) for 120 degrees to bring the next mandrel 30 into operatingrelation with the shaft 4| where it is held in position by pin I'll.

After the hand wheel 22 starts to turn, the pinion gear I40" engagesgear Itl thus rotating mandrel 3| further, and the perforated foil ispulled and driven to the winding position of the next mandrel. Hub 21then leaves engagement with bar 96, and the spring 82 rotates the lever94 in the clockwise direction about its pivot 85 so that the pawl teeth85 and to engage respectively with ratchet wheels 81 and 88 that arefastened rigidly on the foil spindles. Thus, when the operator hasrotated the hand wheel partway, for example, about 60 of the 120 degreesrotation to the next mandrel position, the foil spindles are stoppedfrom further rotation by the brake, and the foil being thereby stoppedfrom further feeding, breaks along the line of perforations which havejust been made. As the hand wheel continues to rotate to the full 120degrees the paper strips continue to be pulled so that they will layover the next succeeding mandrel, and the broken foil ends separateseveral inches within the paper strips. Fig. 4 shows the turned positionof the hand wheel at the instant the foils are breakin apart at I80. Asthe operator continues to operate the hand wheel to the full 120 degreesthe ends of the foils I and IM, severed at the perforations, pullfurther apart, assuming the position shown in Fig. 6; and during thisturning of the hand wheel the mandrel which has just been woundcontinues to rotate in the winding direction by the meshing of thepinion I40" with stationary gear |4| so as to continue to roll up thesevered strips of foil and the uncut insulating strips. At the end ofthe 120 degrees travel the insulating strips engage the stationarycutter as, as shown in Fig. 6, which cutter is adapted to cut the paperabout midway between the severed ends of the foilstrips. A label maythen be pasted over the roll tohold the strips on the wound mandrel.

Terminals may then be attached to the foils of the wound condensers. Ifthe foil rolls 90 and 9| be positioned at their spindles so that theedge of one foil strip extends beyond the edge of the paper strips, andthe opposite edge of the other foil strip extends beyond the oppositeedge of the paper strips, the condenser roll will be formed with thefoil edges protruding from the two ends of the roll, so that conductingterminals may readily be soldered to these. protruding foils.

Since the insulating and foil strips will extend over the next mandrel30 at the end of the degrees rotation, it is only necessary in order tostart the next condenser roll, to place the mandrel pin in a groove inmandrel 30 prior to the cutting of the paper strips. Then after thecutting the roll on mandrel so is wound up in the same way as describedfor the mandrel 3|, because mandrel at is now in operating relation withshaft 4|.

It will be noted that when the mandrel 30 is coming up to the windingposition while the hand wheel is being turned, its driving pin 38engages with a movable spring latch cam 200 which rotates with pin 83 tothe top of the hand wheel so that when the pin leaves the cammingsurface it has positioned the mandrel with the groove upward, ready toreceive the foil and insulating strips for the succeeding mandrelwinding. Just before the mandrel reaches the operating position inrelation to its driving shaft 4| the latch 20o drops back to theposition shown in Fig. 1, ready to operate on the driving pin of thenext mandrel when the hand wheel is again rotated.

By reason of the automatic perforating and severing of the foil andcutting of the paper strips, the labor heretofore involved of tearingout the ends of the foil to insure that they lie well within the ends ofthe paper is eliminated; and also the wastage of foil heretoforeattendant upon tearing out parts of it is eliminated. By the use of thefoil perforator in connection with the brake for the foil roll, it hasbeen found that the output of a machine can be greatly increased. Itwill also be noted that by reason of the fact that the a foil isperforated and not cut it is not thrown out of line when severed, as dueto the perforation the foil severs at the perforation without moving outof line.

I claim:

1. A foil-severing mechanism in combination with a machine for windingfoil and insulating strips into condenser rolls of the type comprising adrive shaft, an engageable clutch through which said shaft is adapted tobe driven from a source of power, a mandrel support having journaledtherein a plurality of mandrels, said support being rotatable forplacing said mandrels successively in driving relation with said driveshaft, a lever for engaging said clutch to start the mandrel winding,and a device for automatically disengaging said clutch upon theexpiration of a predetermined number of mandrel revolutions, saidsevering mechanism comprising: foil perforating teeth positionedadjacent the foil traveling to the mandrel, an arm for operating theteeth and a lever operable upon disengagement of said clutch to operatesaid arm and thus produce a. line of perforations across the foil, aninterlocking means adapted to interlock with the mandrel by movement ofsaid rotatable mandrel support, said interlocking means when interlockedwith the mandrel being adapted to prevent rotation of the mandrel in theunwinding direction, a braking means operated by movement of saidmandrel support to retard the foil strips at the side of theperforations remote from the mandrel against traveling toward themandrel when said mandrel support is turned to move the wound mandrels'out of driving relation with the drive shaft, so that the foil stripsare pulled apart at the perforations and the torn ends separate duringthe turning, thereby permitting severing of the insulating stripsbetween the separated foil ends.

2. In a foil and insulating: strip winding machine comprising a movableframe a winding mandrel mounted on said frame and rotatable relativelythereto, a power drive for said mandrel, a plurality of spindles forholding rolls of foil and insulating strips to be wound into a roll onthe mandrel, and means for automatically stopping the rotation of themandrel after a predetermined number of turns is wound thereon: aperforating device through which the foil strips are passed in travelingfrom the foil rolls to the mandrel, said perforating device havingmovable perforating teeth for perforating the foil, a leverautomatically operated upon the stoppi 8 of the rotation for moving theteeth to perforate the foil strips, and a brake which when set holds thefoil rolls from further rotation, said movable frame associated with themandrel acting to set the brake and operate on the mandrel side of theperforations to pull the foil strips andizhereby sever the foil at theperforations.

3. The method of making condenser rolls which comprises winding on amandrel alternate interleaved strips of insulating material andconducting material, stopping the rotation of the mandrel after thedesired number of turns has been wound, perforating the conductingstrips along a line ClOSSil'lg said conducting strips, at a positionoutside the mandrel winding, moving the mandrel in a direction to pullthe strips in the general direction they were traveling while themandrel was rotating while holding the mandrel against rotation in theunwinding direction, then holding those parts of the conducting stripsasaas'ro automatically disengages said clutch when a predeterminednumber of turns of foil and insulating strips is wound on said mandrelfrom mils, said movable frame being operable to pull from the rolls,after a winding is made on the mandrel, sufficient additional length ofthe strips to reach the winding positon of the mandrel for thesucceeding winding after the strips are severed at a position betweenthe wound mandrel and the rolls, said severing mechanism comprising:foil perforating teeth positioned adjacent the foil strip traveling fromthe foil roll to the mandrel, an arm operative to move said teeth intoperforating engagement with the foil strip, a lever moved upon thedisengagement of said clutch to operate said arm and thus produce a lineof perforations across the foil strip, an interlocking means adapted tointerlock with the mandrel by movement of said movable frame, which wheninterlocked with the mandrel, prevents rotation of the mandrel in theunwinding direction, a brake operated during movement of said movableframe to hold the foil roll against which are at the side of theperforations remote I denser roll: a winding mandrel on which the stripsare wound, said mandrel having a pinion attached to it, a turns-counteroperated means for automatically stopping the winding of the roll on themandrel after a number of turns is wound, a perforator for perforatingthe foil after the turns are wound, a movable frame on which furtherrotation in the direction of feeding to the mandrel so that the foilpulls apart at the perforations and the parted ends separate for adistance, thereby permitting severing of the insulating strips betweenthe separated foil ends.

6. A mechanism adapted to sever a foil strip which is wound withinsulating strips into a condenser in a winding machine having a windingmandrel supported on a movable frame which when in its winding positionmay be driven from .a source of power through an engageable clutch,

Jacent the foil strip travelling from the foil roll to the mandrel, anarm operative to move said teeth into perforating engagement with thefoil strip, a lever moved upon the disengagement of said clutch tooperate said arm and thus produce a line of perforations across the foilstrip, gear 7 means movable into engagement by movement of the mandrelis mounted for moving the mandrel in a direction'to pull the strips inthe general direction in which said strips were traveling to the mandrelduring the winding, a fixed gear for engaging the pinion on the mandrelduring said movement of the movable frame for producing further mandrelrotation, a brake operating on the foil at the side of the perforationsremote from the mandrel for tensioning the foil to part it at theperforations, and a knife for severing the insulating strips at aposition between the separated severed ends of the foil.

5. Mechanism adapted to sever a foil strip which is wound withinsulating strips into a condenser in a winding machine having a windingmandrel supported on a movable frame and driven from a source of powerthrough an ensaid movable frame to rotate the mandrel in the directionto continue the winding of the strips thereon, a brake operated duringmovement of said movable frame to hold the foil roll against furtherrotation in the direction of feeding to the mandrel so that the foilstrip severs at the perforations and the severed ends separate for adistance, thereby permitting severing of the insulating strips betweenthe separated foil ends.

'7. In a foil and insulating strip winding machine comprising a windingmandrel supported on a movable frame, a power drive, a releasable clutchthrough which the mandrel is driven from said drive. a plurality ofspindles for holding rolls of foil and insulating strips to be woundinto a roll on the mandrel, and means for automatically disengaging theclutch after a predetermined number of turns is wound on the mandrel: aperforating device through which the foil strips are passed intravelling from the foil rolls to the mandrel, said perforating devicehaving movable perforating teeth for making a line of gageable clutch, aturns-counting device which perforationsacrossthefomalever operateduponrelease" of the clutch for moving the teeth to perforate the foilstripe, a brake whichwhen set holds the foil strips at'the side of theperforations remote from the mandrel from further feeding toward themandrel, said movable frame being adapted to move the mandrel to pullthe foil strips from the mandrel side of the perforations and to set thebrake and thereby sever the foil at the perforations.

8. In a winding machine for winding a plurality of interleaved foil andinsulating strips from supply rolls to form a condenser: a movable framehaving mounted on it a mandrel on which the strips are rolled, means forstopping the rotation of the mandrel, a foil perforatcr, an arm whichautomatically operates the perforator when the mandrel rotation isstopped to produce a line ofperforations across the foil before the partof the foil thus perforated reaches the condenser roll, said movableframe carrying said mandrel being operable on the part of the foil whichis on the side of the perforations nearer the mandrel to pull theperforated-part some distance beyond the perforator, a device operatedduring motion of said frame for rotating the mandrel in the direction tocontinue the rolling ofthe condenser, and a brake operated during motionof said frame for holding the foil at the side of the perforationsremote from the mandrel.

9. In a foil and insulating strip winding machine comprising a movableframe, a winding mandrel mounted on said frame, a power drive for saidmandrel, a plurality of spindles for holding rolls of foil andinsulating strips to be wound into a roll on the mandrel, and means forautomatically stopping the rotation of the mandrel after a predeterminednumber of turns is wound thereon: a perforating device through which thefoil strips are passed in traveling from the foil rolls to the mandrel,said perforating device having movable perforating teeth for perforatingthe foil, means automatically operated upon the stopping of the rotationfor moving the teeth to perforate the foil strips, a brake which whenset holds the foil rolls from further rotation,

said brake being operated by movement of said movable frame so that thefoil strips are pulled by movement of the frame from the mandrel side ofthe perforations against the force of the brake, to sever the foil atthe perforations.

10. In a winding machine for winding a. plurality of interleaved foiland insulating strips from supply rolls to form a condenser: a movableframe, a rotatable mandrel mounted on said frame on which the strips arerolled, means for stopping the rotation of the mandrel, a foilperforator, a device which automatically operates the perforator whenthe mandrel rotation is stopped to produce a lineof perforations acrossthe foil before the part of the foil thus perforated reaches thecondenser ,groll, said frame when moved operating on the part of thefoil which is at the side of theperforations nearer the mandrel to pullthe perforated part some distance beyond the perforator, a deviceoperated during motion of said frame for rotating the mandrel in thedirection to continue the rolling of the condenser, and a brake operatedduring motion of said frame for holding the foil at the side of theperforations remote from the mandrel.

11. In a machine for winding a succession of condenser rolls, aplurality of rotatable mandrels mounted on a support which is movable tosuccessive positions to place the mandrels succesassacrb sively inoperating relation with a mandrel drive, means for leading a pluralityof conducting and insulating strips in interleaved relation to themandrel which is related tothe drive, a device for perforating theconducting strips after turns have been wound on the driven mandrel,abrake operable to retard the movement of the conducting stripe towardthe driven mandrel from the side of the perforations remote from themandrel, the counterclockwise movement of the man-'- drel support fromone mandrel position to the next serving to operate the brake and beingin a direction to pull the strips over the succeeding mandrel moved intorelation with'the drive by said movement and to part and separate theparted conducting strip ends at a place between the two last-mentionedmandrels, a device for continuing the rolling up of the strips on thewound mandrel when the mandrel support is thus moved, a device forclamping the strips to said succeeding mandrel, a knife for cutting theinsulating strips at a position between the said two last-mentionedmandrels and between the separated conducting strip ends, whereupon saidsucceeding mandrel can be driven and the roll on the first-mentionedmandrel completed and removed from its mandrel.

12. In a machine for winding a succession of condenser rolls, aplurality of rotatable mandrels mounted on a support which is movable tosuccessive positions to place the mandrels successively in operatingrelation with a mandrel drive, means for leading a plurality ofconducting and insulating strips in interleaved relation to the mandrelwhich is related to the drive, a device for perforating the conductingstrips after turns have been wound on the driven mandrel, a brakeoperable to retard the movement of th conducting strips toward thedriven mandrel from the side of the perforations remote from themandrel, the movement of the mandrel support from one position tothe'next serving to operate the brake and being in a direction to pullthe strips over the succeeding mandrel moved into relation with thedrive by said movement and to part and separate the parted conductingstrip ends at a place between the two last-mentioned mandrels, aninterlocking means adapted to interlock with the mandrel by movement ofsaid support to prevent rotation of the mandrel in the unwindingdirection, a device for clamping the strips to said succeeding mandrel,a knife for cutting the insulating strips at a position between the saidtwo last-mentioned mandrels and between the separated conducting stripends, whereupon said succeeding mandrel can be driven and the roll onthe first-mentioned mandrel completed and removed from its mandrel.

13. Apparatus according to claim 12 in which said mandrels are spacedapart on the support by a distance at least as great as said separationof the conducting strips so that said separation lies between saidmandrels when the insulating strips are cut,

14. In a machine for winding a succession of condenser rolls, aplurality of rotatable mandrels mounted on a frame which is movable tosuccessive positions to place the mandrels successively in operatingrelation with a mandrel drive, means for leading a plurality ofconducting and insulating strips in interleaved relation to the mandrelwhich is related to the drive, a device for parting the conductingstrips after turns have been wound on the driven mandrel, means forretarding the movement of the conducting strips toremote from themandrel, the movement of the frame from one position to the next beingin a direction to pull the strips over the succeeding mandrel moved intorelation with the drive by said movement and to separate the partedconducting strip ends at a place between the two last-mentionedmandrels, an interlocking means adapted to interlock with the mandrel bymovement'of said support to prevent rotation. of the mandrel in theunwinding direction, a device for clamping the strips to said succeedingmandrel, whereby the insulating strips may be cut at a position betweenthe two last-mentioned mandrels and between the separated conductingstrip ends and the succeeding mandrel then driven and the roll on thefirst-mentioned mandrel completed and removed from its mandrel.

15. In a winding machine for winding a plurality of interleaved foilandinsulating strips from supply rolls to forms. condenser: a movableframe carrying a mandrel on which the strips are rolled, a foilperforator, means for automati'cally operating the perforator to producea line of perforations across the foil before the.

part of the foil thus perforated reaches the condenser roll, saidmovable frame being operable with the rotating mandrel to pull the partof the foil in advance of the perforation so as to part and sever thefoil along the line of perforations while the foil is being retarded ata point in back of the perforations by a braking device operated duringthe motion of said frame. 1 I

16. In a winding machine for winding a plurality of interleaved foil andinsulating strips from supply rolls to form a condenser: a movable framecarrying a mandrel on which the strips are rolled, means for measuringthe foil and insulating strips wound on the mandrel, a foil perforator,means which automatically operate the perforator to produce a line ofperforations across ward the driven mandrel from the parted side fromsupply rolls to form a condenser: a rotatable mandrel driven from asource of power through an engageable clutch, control means ad- Justableto predetermine the amount of said strips to be wound to disengage saidclutch, said control means comprising a half nut slidable in onedirection on a threaded revolving shaft driven from the source of powerand returnable to starting position, a measuring rod, a device forstopping of the half nut at any fixed point of its travel in onedirection on said measuring rod. means set in operation by said stoppingdevice to disengage the clutch from the driven shaft and reverse thedirection of travel of said half nut and means operable by said half nutin returning to its original starting position to operate a foilperforator mechanism to produce a line-of perforations across the foil,means acting. to tension the foil against the pull of the windingmandrel so as to sever and separate the perforated foil along the lineof perforations. and means to cut the insulating strips between theseparated ends of the foil.

19. In a condenser winding machine a rotatable mandrel for winding upinterleaved foil and insulating strips driven from a source of powerthrough an engageable clutch, a movable frame the foil before the partof the foil thus perforated reaches the condenser roll, said movableframe being operable with the rotating mandrel to pull the foil was topart and sever the foil along the perforations while the foil is beingretarded by a braking device operated during the motion of said frame,and having cutting means movable frame, means for cutting saidinsulating strips, an automatic clutch mechanism operable afterpredetermined lengths of foil and insulating strips have been wound,perforating means arranged between the foil supply rolls and theinsulating strip cutting means which operate to perforate the foil; themovable frame being adapted to pull on the side of the foil in advanceof the perforations, means operating on the foil supply rolls to retardthe advance of the foil while underthe action of the movable frame sothat the foil separates at the perforations; said strip cutting meansbeing aiiixed to the movable frame to cut the insulating strips betweenthe separated ends of the foil and means mounted on the movable framefor rotating said mandrelto wind up the severed ends of the strips.

18. In a winding machine for winding a plurod, a device for stopping thetravel of the half rality of interleaved foil st ip on which saidmandrel is mounted, control means connected to the source of power fordisengaging the clutch when definite lengths of foil and insulatingstrips have been wound, said means controlling the operation of a leverfor operating foil perforators to perforate the foil at that time, saidmovableframe being operable with the rotating mandrel to pull the foil,a brake for preventing further feeding of the foil while said movableframe is in motion so that the foil strips sever and separate at theperforations, means aiilxed to the movable frame for severing theinsulating strips and means for rotating the mandrel after the severanceof the foil and the insulating strips to wind the trailing ends of thestrips onto the mandrel.

'20. A foil measuring and severing mechanism in combination with amachine for winding foil and-insulating strips into condenser rolls of atype comprising a rotatable mandrel supported on a movable frame anddriven from a source of power through an engageable clutch, said foilmeasuring and severing mechanism comprising a half nut slidable on athreaded revolving shaft driven from the source of power. a measuringnut at a p edetermined point, means set in motion by said stoppingdevice to disengage said clutch, means to return the half nut to itsoriginal position, a foil perforator actuated by a lever on the-returnof said half nut to produce a line of perforations across the foil, aninterlocking means adapted to interlock with the mandrel by movement ofthe movable frame, said interlocking means when interlocked with themandrel being adapted to prevent rotation of the mandrel in theunwinding direction, a brake operable upon the movement of'said frame toretard the feeding of the foil toward the driven mandrel, so'

